LXT970ATC datasheet(50/74 Pages) INTEL

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LXT970A — Dual-Speed Fast Ethernet Transceiver

Datasheet

Table 29. 10BASE-T Transceiver Characteristics

Parameter

Sym

Min

Typ

Max

Units

Test Conditions

Transmitter

Peak Differential

Output Voltage

VOP

2.2

2.5

2.8

With transformer, line

replaced by 100

Ω (±1%)

resistor

Transmit Timing Jitter added by the

MAU and PLS Sections2,3

–

After line model specified by

IEEE 802.3 for 10BASE-T

MAU

Receiver

Receive Input Impedance2

ZIN

–

3.6

–

Ω

Between TPIP/TPIN

Differential Squelch Threshold

VDS

300

420

585

5 MHz square wave input

1. Typical values are at 25 °C and are for design aid only; not guaranteed and not subject to production testing.

2. Parameter is guaranteed by design; not subject to production testing.

3. IEEE 802.3 specifies maximum jitter additions at 1.5 ns for the AUI cable, 0.5ns from the encoder, and 3.5ns from the MAU.

Table 30. 10BASE-T Link Integrity Timing Characteristics

Parameter

Sym

Min

Typ

Max

Units

Test Conditions

Time Link Loss Receive

TLL

150

–

Link Pulse

TLP

Link Pulses

–

Link Min Receive Timer

TLR MIN

–

Link Max Receive Timer

TLR MAX

150

–

Link Transmit Period

Tlt

–

Link Pulse Width

Tlpw

–

100

–

1. Typical values are at 25 °C and are for design aid only; not guaranteed and not subject to production testing.

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